Dozens of teachers, dressed in red and carrying signs reading "Students, Teachers, Parents: Unite!" picketed outside Lane Tech High School Tuesday afternoon; the end of the first day of classes for a majority of CPS schools.


In many ways, it was a preview of what could happen during a Chicago Teachers' Union strike planned for September 10th.


While some drivers honked their horns in support as they drove past on Western and Addison, others shook their heads.


CTU is embroiled in a contentious contract negotiation with Chicago Public Schools.  


Faced with a massive deficit, CPS is walking a fine line between mandating a longer school day and year and paying what union teachers want, in order to work the extra hours.


CPS CEO Jean-Claude Brizard says he wants to strike a deal with CTU that respects their position but can only afford so much.


"Negotiation is all about movement on both sides. It's all compromise on both sides and I think we're willing to make that happen," said Brizard.


On the topic of compromise, CTU President Karen Lewis told WGN's Morning News, "I'm not interested in talking about half way or three-quarters of the way. It's about the complete package of what our contract looks like."